二氧化碳静态爆破的边坡振动场地效应和能量分析  

Study of slope vibration site effects and energy analysis from CO_(2) static blasting

作　　者：王小飞 胡少斌 王恩元 WANG Xiao-fei;HU Shao-bin;WANG En-yuan(School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;Tunnel and Underground Engineering Institute,College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China [2]Tunnel and Underground Engineering Institute,College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China

出　　处：《Journal of Central South University》2024年第1期210-224,共15页中南大学学报（英文版）

基　　金：Project(51934007) supported by the Key Project of the National Natural Science Foundation of China;Project(2022YFC3004700) supported by the National Key Research and Development Programme of China;Project(BK20201313) supported by the Natural Science Foundation of Jiangsu Province,China;Project(2019JZZY020505) supported by the Major Scientific and Technological Innovation Project of Shandong Province,China。

摘　　要：进行真三轴CO_(2)静态爆破压裂实验和现场测试,获得压力曲线、试样裂隙分布、现场振动曲线和岩体破坏特征,并通过分析压力曲线和裂缝扩展特征来研究致裂原理,同时还利用窗函数傅里叶变换提取振动特征,以评估破岩现场边坡的结构安全。研究结果表明:(1)CO_(2)静态爆破的峰值振动速度在8 m处衰减至满足建筑物保护要求,比传统的钻爆法更安全;(2)CO_(2)静态爆破引起的振动波形的主频高于钻爆法的,且随着距离的加长,振动能量的分布逐渐分散;(3)钻爆法的振动速度预测公式适用于CO_(2)静态爆破的,且带高程的预测公式更为准确。根据压力曲线、试样裂隙分布和现场岩体损伤,提出CO_(2)静态爆破的HIG破岩模型,为新技术的研究提供了基础框架。在实验中没有采集到温度数据,今后迫切需要对聚能剂的瞬时放热特性和温度对CO_(2)状态的影响进行研究。The novel CO_(2) static blasting method offered good prospects for application as it was more effective than mechanical rock breaking,less vibratory,less dusty and quieter than the traditional drill and blast method.We carried out both true triaxial CO_(2) static blasting fracturing experiments and rock-breaking site vibration monitoring experiments to extract vibration signal characteristics,focusing on slope safety.The results show that:1) the peak vibration velocity of CO_(2) static blasting decayed rapidly and dropped below 30 mm/s at 6 m;2) the principal frequency of the vibration waveform spectrum caused by CO_(2) static blasting was higher than that of the drill-and-blast method;3) the vibration velocity prediction formula used in the drill-and-blast method was applicable to CO_(2) static blasting,and the prediction formula with elevation was more accurate.An HIG fracturing model for CO_(2) static blasting is proposed,which provides a basic framework for research of new rock-breaking techniques.The vibration displacement of the slope under CO_(2) static blasting is minimal,and more attention should be paid to the exothermic and temperature measurement of the polyenergy agent in the future.

关 键 词：破岩技术 二氧化碳静态爆破 振动速度 致裂机理 能量计算 

分 类 号：TU751.9[建筑科学—建筑技术科学] TU435